Finding the Fourth Proportional to 121,145.62, 181,748.67 and 42,260.50

Step by Step Solution

1. Step 1: Write the proportion equation
   121,145.62 : 181,748.67 = 42,260.50 : x
2. Step 2: Convert to fraction form
   121,145.62/181,748.67 = 42,260.50/x
3. Step 3: Cross multiply
   121,145.62x = 181,748.67 × 42,260.50
4. Step 4: Simplify right side
   121,145.62x = 7,680,789,668.54
5. Step 5: Solve for x
   x = 7,680,789,668.54/121,145.62
6. Step 6: Final answer
   x = 63,401.30